A Russian nuclear submarine has caught fire in a shipyard in Russia's northern province of Arkhangelsk, Russian news agencies reported on Tuesday.
Both the Zvyozdochka shipyard, where wires said the 949 Antei submarine was being repaired, and the Emergencies Ministry declined to comment.
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There was no word of any casualties.
Russian news agency Interfax cited a separate source as saying there were no weapons onboard the submarine and other news agencies said the fire had started during welding, causing insulation materials to catch fire.
TASS news agency cited a source as saying the submarine's nuclear reactor had been shut down prior to the blaze.